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Cheap, homemade, cb and 10 meter antenna from pvc and Romex wire
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- čas přidán 21. 05. 2021
- I made this antenna a couple years ago and decided to finally make the video public. I have it mounted side mount on the tower and by sliding it to and from the tower you can affect the tuning dramatically. I get really good performance from this antenna and it is up about 25 feet it would be quite easy to run this either horizontal or vertical and use larger coacts for higher power operation.
12 watts on 11 meter SSB. Nowadays with all the electronic emissions being heard as static on 11 meters you would be lucky to be heard above the static a few miles away running stock 4 watts. The FCC needs to adjust the rules so more wattage is allowed on 11 meters. Like 25 watts on AM and 75 on SSB. Nice antenna by the way.
I Hybridized PVC/Copper wire/Aluminum tubing during my last years of ham antenna builds ... lots of fun thinkin' outside the box of computer designs!!!
Professional quality build, man!
That's nice PJ!
Thanks Watt
Good job man
Being a dipole, vertical was it 70 ohms at the feed-point? Just curious, I am thinking of building a 20 meter exactly like you did except using some cable hardline that is 75 ohms figuring on letting the atu touch it up or just ignore it. What was yours? Or I could just make a version where the shield is just bent back over the coax cable as a sleeve dipole and end-fed? Yours would mount easier on a tower while mine could be just mounted on another plastic pipe of some kind?
The theoretical says it would be 70 ohms show driving it with 75 on coax shouldn’t be an issue. Like you say touch it up with a tuner. I can also say that mounting it on a tower sliding it in and out from the metal structure I can tune it up and down the band due to the capacitive coupling to the tower. I built a wire in antenna one time mounted at 1 foot off of a steel structure. I tuned it for theoretical at 26.4 MHz which was a frequency we were licensed to use and the antenna came out resonant around 15 m 21 MHz. So close proximity to a steel structure makes a huge difference in how these antennas tuneup.
Where are you located, I'm going to build another one, more modified like yours, I like the idea of heavier duty pipe then going out, I plan on replacing my horizontal dipole with one like this, nice work, 73"s from southern utah
did you keep the 12 AWG in the Rome? If not, did you twist all three conductors at the ends?
No, I stripped apart the wire I use the black conductor for one of the dipole, the white conductor for the other side of the dipole. If you look at 2:37 you will see it inside the conduit. I could have used the bare wire remaining for one of the conductors as well.
my ends were off like yours
I suspect, after I thought about this a little bit, a dipole is 70 ohms, that by offsetting the centerpoint it brought the impedance closer to 50 ohms.
You can do this without the PVC if you don't want to spend the money on that I made one and it works great.